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Sea-Floor Character and Geology Off the Entrance to the Connecticut River, Northeastern Long Island Sound

Conversion Factors

Title Page List of Figures Conversion Factors Abstract Introduction Setting Methods Bathymetry Sidescan Sonar Sediment Distribution Bottom Photography GIS Data Catalog Summary Acknowledgments References Contacts

SI to Inch/Pound Multiply By To obtain Length millimeter (mm) 0.03937 inch (in.) centimeter (cm) 0.3937 inch (in.) meter (m) 3.281 feet (ft) meter (m) 1.094 yard (yd) kilometer (km) 0.6214 mile (mi) kilometer (km) 0.5400 mile, nautical (nmi) Area square kilometer (km²) 0.3861 square mile (mi²) Volume cubic meter (m³) 35.31467 cubic foot (ft³) Flow rate centimeter per second (cm/s) 0.3937 inch per second (in/s) meter per second (m/s) 3.281 foot per second (ft/s) cubic meter per second (m³/s) 35.31 cubic foot per second (ft³/s)

Phi-notation (Krumbein, 1934) as used in this report is defined as: Φ = -log₂ (d), where d is the grain diameter in millimeters. Phi-class intervals in millimeters are given in the data dictionary in the Sediment Distribution section of this report.

The speed of a current is measured in knots (kt). 1 knot = 0.514 meter per second (m/s).

Horizontal coordinate information projected in Universal Transverse Mercator (UTM) is referenced to the North American Datum of 1983 (NAD 83); horizontal information in geographic coordinates is referenced to the World Geodetic System 1984 (WGS84). The vertical datum for tidal-zone measurements is mean lower low water (MLLW).

Additional Abbreviations

BASE - bathymetry adjusted for statistical error

CLIS - central Long Island Sound

DGPS - differential global positioning systems

DTM - digital terrain model

Is - island

kHz - kilohertz

kyBP - thousands of years before present

MBES - multibeam echosounder

Pt - point

s - second

% - percent

> - greater than

< - less than